bin: prepare for scheme editor

Optionally build against slint (sixtyfps) to provide an “edit”
subcommand.

1 files changed, 2 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index ac7f62c..6aca9fc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,9 +18,11 @@ libc        = "0.2"
 clap        = { version = "2.33", optional = true }
 anyhow      = { version = "1.0", optional = true }
 base64      = "0.13"
+slint       = { version = "0.2", optional = true }
 
 [features]
 vtcol-bin   = [ "anyhow", "clap" ]
+gui         = [ "vtcol-bin", "slint" ]
 
 [[bin]]
 name                    = "vtcol"